Static Overlay for Pressure Ulcer Prevention: A Randomized, Controlled Trial

Vol. 24, No. 8 August 2012 207 Abstract: Numerous pressure-relieving surfaces of varying costs are available for the prevention of pressure ulcers. There is insufficient evidence to draw conclusions regarding the efficacy or merits of using more expensive technologies. The purpose of this unblinded, randomized, prospective study was to compare the clinical and the cost effectiveness of an inflated overlay with rented, pressure-relieving surfaces for the prevention of pressure ulcers. Methods. Patients in a 257-bed acute care facility were included if they had a Braden score of ≤ 14, had no skin lesion(s), were ≥ 18 years, weighed <300 lb, and submitted signed consent. One hundred, ten patients (110) were randomized into a control group using either a microfluid static overlay (MSO) or a low-air-loss dynamic mattress (LALDM) with pulsation (n = 55) or into an experimental group using an inflated static overlay (ISO) (n = 55). Both groups had identical positioning protocols. No statistically significant differences were noted between the 2 groups with regard to age, gender, weight, or Braden scale score. Head-to-toe assessments were performed 3 times a week for a maximum of 14 days to determine presence of pressure ulcers and comfort; Fisher’s exact and chisquared tests were used to assess categorical data, and unpaired t-test and Mann-Whitney statistic tests were used to compare continuous variables. Comparative cost of support surface use was determined at the end of the study. Results. In the control group, 50 patients used an MSO and 5 patients used an LALDM; in the experimental group, 55 patients used an ISO. No significant difference in pressure ulcer incidence was found between the control (n = 6) and experimental groups (n = 2) (11% versus 4%, respectively; P = 0.2706), and there was no significant difference in comfort (90% versus 85%; P = 0.7129). However, a significant difference was noted in total cost ($13,606 CAD versus $3,364 CAD, P ≤ 0.001); the ISO was less expensive. Conclusion. The use of an ISO offers a cost-effective option for the prevention of pressure ulcers in a moderate to very high-risk population. WOUNDS 2012;24(8):207–214